Coal-drilling machine



2 SheetS -Sheet 1 (No Model.)

J. M. & JJW. DAVIES.

GOAL DRILLING MAGHINE.

Patented Jan. 8, 1884.

(No Model.) 2'She etsSheet 2.

M. & J. W. DAVIES. 7 GOAL DRILLING MACHINE.

N0. 29 1.578. Patented Jan. 8,188.4.

z v z j m N. PEIERS. Phalu-Mlwgmpher, Waihlnghn. as.

A A'FUNNITED STATES PATENT JONATHAN M. DAVIES AND JOHN V. DAVIES, OFBRYAN, OHIO.

COAL-DR|LLING MACHINE.

$PECIFIGATION forming part of Letters Patent No. 291,578, dated January8, 1884.

Application filed May 15, 1883. (No model.) 7

' To all whom it may concern.-

Be it known that we, JONATHAN M. Dnvrns and J ornv W. DAVIES, citizensof the United States, residing at Bryan, in the county of lVilliams andState of Ohio, have invented certain new and usefulImprovementsin Goal-Drilling Machines; and we do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being hadto theaccompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

Our invention relates to improvements in coal-drilling machines; and ithas for its obj ect the provisionof asimple, durable, and easily-operated drill, that, although particularly designed for the use ofcoal-miners,may be adapted for use in mines of different character, orin tunneling. y

To the accomplishment of the above-named objects it consists in asuitable frame provided with means whereby to secure it in ver-' ticalposition in shafts of mines or tunnels, said frame being furtherprovided with a screw-threaded drilling-bar, having a head for thereception of the drills, said bar having ro- I tary and longitudinalmotion imparted theret0,by means hereinafter described and claimed, forthe purpose of projecting the boring-bit forward and into the coal orother material to I be drilled.

It further consists in means whereby the drilling-bar may be returned toits normal position, thus drawing the drill backward and out of the holealreadybored.

It further consistsin means whereby the boring-bar may be set and causedto move forward at different angles with reference to the mass ofmaterial to be drilled, without moving the frame from its verticalposition; and it finally consists in the construction, arrangement, andcombination of the various parts, substantially as hereinafter describedand claimed.

Referring to the accompanying drawings,in which similar letters ofreference denote similar parts,Figure 1 represents a side elevationiofour invention in position for use. Fig. 2 represents a front elevationthereof. Fig. 3 represents a transverse sectional view of the frame,taken on the line on w of Fig. 2. Fig. 4 repre sents a front elevationof the bit-holding head. Fig. 5 represents a longitudinal section of thebit-holding head, taken on the line 3 y of Fig. 4. Fig. .6 i representsan enlarged sectional view taken on the line 1 1 of Fig. -1, thespurrepresents the rotary sleeve upon which is mounted the mainspur-wheel.

In the drawings, A represents a frame, consisting of two side pieces,joined together at top and bottom by blocks a and bolts (4', that passthrough the side pieces and interposed blocks, a. We preferably make theentire frame A of wood; but, if desired, said frame may be formed ofmetal. r I

B B represent metal frames consisting each of two side bars joinedtogether at their outer ends by cross-bars b b, as shown. The side barscomposing the frames :13 B move and slide in grooves b formed in theinner sides of the side pieces of the frame A. The inner free ends ofthe frames B B, when pushed in to the frame A, pass each other in thegroove b, as shown bydotted lines in Fig. 2, and said frames B B areheld in position by removable pins ad, that pass through the sides ofthe frame Aat top and bottom, and enter apertures I) in the frames B B.The endsb b of the frames B B are provided upon their inner sides withbosses b", and said ends and bosses are provided with apertures havingfemale screws cut therein, through which pass male screws 0. Said malescrews are each capable of being turned out to a considerable distance,and are each provided with heads 0, having apertures c for the receptionof a handle or lever, 0 whereby the screws are turned.

G represents metal blocks or shoes interposed between the heads of thescrews and timbers 0 C placed, respectively, at the top and bottom ofthe mine-shaft.

From the above-described construction it will be seen that the frame Aand its attached mechanism may be firmly fixed in position in shafts ofdifferent heights, it only being necessary to move the frames 13 B intoor from the frame A.

D represents a casting chambered out or hollow from end to end, as shownat (Z. The casting D is provided upon its opposite sides and near itsrear end with trunnions D, said trunnions entering apertures in theopposite sides of the frame A, and pivoting or hanging the casting D insaid frame. D' represents a fiat curved bar, attached at eachend to theunder side of the casting D.

. The bar ,D is provided with apertures d for the purpose of adjustingthe casting D at different, angles, said casting being held at therequired angle by a pin, cZ, that passes through theside of the frame Aand through one of The chambered portion (1 of the casting D is providedatone end (the rear end) with small flanges (Z1, said flanges projectingfrom the opposite interior side walls of such chambered portion d. Theflanges d extend forward to a point I 'D, projecting from the casting D.

opposite the trunnions D, while for a similar distance the upper andlower inner surfaces of the chamber (Z is cut away to a depth greaterthan the remaining portion of the chamber cl, thus presenting anaperture elliptical in cross- Section, provided at each side with theflanges d, as shown in Fig. 9. The object of this construction will bepresently explained.

. E represents a sleeve placed within the rear end of the casting D inthe elliptical-shaped chamber thereof. The sleeve E is formed in twoparts or halves,e e,and each of said halves is screw-threaded upon itsinner surface, as shown in Fig. 8. The halves of the sleeve E arefurther provided upon their outer sides, at their points ofjuncture,with grooves e, for the reception of the flanges d, as shown inFig. 9. The parts or halves of the sleeve are moved toward or from eachother by set-screws e", the elliptical shape of the chamber (Z at thispoint admitting of such movement. The opposite end of the castingD isprovided with a rotating sleeve, F, secured within the aperture din saidcasting by a pin, f, that passes through the casting and enters agroove, f, cut into the sleeve F. The outer end of said sleeve is madesmaller .from a point corresponding with the end of the casting, and isprovided with ascrewthreaded portion, as shown in Fig. 11. Upon suchsmaller portion of the sleeve is secured, by a nut, a bevel-toothedspur-wheel, G, the teeth of which engage with and are driven by theteeth upon a second spur-wheel, H,

mounted upon the outer end, D, of an offset, The wheel H is providedwith a handle, H, whereby the machine is operated.

K represents a screw-threaded bar that passes through the sleeves E andF. The bar K may be of any desired length; but we preferably make saidbar of such length as will admit the bit-holdin g heads K,secured uponeach end of said bar, to move about twenty-four inches endwise. Thescrew-threaded bar K 18 provided at each end with heads K, each of whichis provided with an aperture to reoelve the shank of the boring-tools,set-screws k holding such toolsin positioninthehead. The bar K isfurther provided with a longitudinal slot, k,extending from end to endthereof, into which extends the inner end of a pin, it, that extendsthrough one side of the sleeve F. In lieu of the pin in the sleeve, saidsleeve may flange, or may be provided with a key-seat,

having a key or spline that engages with the slot in the bar K. Theobject of such pin, key, or spline is to cause the bar K to be rotatedby the sleeve F and its attached spur-wheel G, while said bar is free tomove or to be moved longitudinally by the non-rotating screwthreadedsleeve E. V L represents the tool-holding head, in form as shown inFigs. 4 and 5. Said head isprovided upon its rear end with a projectingshank, L, that enters an aperture in the bitholding head K. The head Lis provided with any desired number, preferably six, of apertures, Z,rectangular in cross-section, and tapering from front to rear. Theapertures Z are for the reception of shanks of cutting-tools Z. Theforward ends of said tools are provided with beveled ends Z", that outinto the coal when the holder L is rotated.

Z represents a center drill, the shank of which fits into an aperture,Z, in the center of the tool head or holder.

The operation of our improved drilling-ma chine is as follows: A firstbeing fixed in a vertical position by means of the lengthening? frames BB and screws 0 at the place where the drilling is to be done, thescrew-threaded halves e e of the sleeve E are by the screws 2 drawn outof engagement with the screwthreaded bar K, and the latter. drawnbackward its full length. The screwthreaded halves e e of the sleeve Eare again brought into connection with the bar K. Rotary motion is nowimparted to said bar by means of the spur-wheelsH and G and sleeve F,and as the threaded sleeve E is by the flanges cZ prevented from'rotating,said sleeve will cause the bar K to move forward, as will bereadily understood. When the full length of the bar has been fed forwardby the sleeve ,1], said sleeve may be moved out of connection withthebar, the latter drawn back, new sections of drillrods inserted, and theabovedescribed operation resumed. As before stated, the casting D may beset at different angles with reference to the substance to be drilled,and this being formed at the same angle.

Having thus described our invention, we

claim and desire to secure by Letters Patent substances, the combinationof the framehaving sides provided upon their inner surfaces with groovesb*, said sides held in parallel planes by blocks a, sliding frames BB.screws 0, provided with head-blocks G, with the casting D, providedwith trunnions D, whereby the said casting is jonrnaled to the sidepieces of the frame A, said casting further provided with curved bar D,whereby it is set at differ- 2. In a drilling-machine for coal and othersubstances, the combination of the frame A, having grooves 1) upon theinner surfaces of its side frames, sliding frames 13 B, having aperturesb and held in place within the frame A by pins (4 adj Listing-screws O,with the casting D,'provided with trunnions D, journaled in the sidepieces of the frame A, and curved bar D fixed screw-threaded sleeve E,rotating sleeve F, bevel-geared spur-wheels G and H, and screw-threadedbar K, substantially as described.

3. In a drilling-machine for coal and other substances, the sleeve E,divided longitudinally into two equal parts, c c, said parts havingtheir inner surfaces screw-threaded, and further provided upon theirouter surfaces with recesses or-grooves 6 in combination with thecasting D, having chambered portion d, provided at the sides adjacent tosaid sleeveE with flanges d, and further having the upper and lowersides, (1 adjacent to said sleeve chambered out, and provided withscrewthreaded apertures, through which pass screwthreaded pins 0",whereby the halves e e are adjusted, sleeve F within casting D,screwthreaded bolt K, passing through sleeves E and F, bevel-gearedspur-wheels G and H, and frame A, substantially as described.

4. In a drilling-machine for coal and other substances, the combinationof the rotating sleeve F, having groove f, into which projects a pin, f,and further provided with a pin, is, or its equivalent, a key or splinethat engages with the longitudinal groove 70 in the screwthreaded bar K,with the screw-threaded bar K, havingthelongitudinalslotk, and providedwith bit-h'oldin g heads K, casting D, frame A, and means, substantiallyas described, whereby said bar K is operated, as herein set forth,

In testimony whereof we affix our signatures in presence of twowitnesses.

JONATHAN M. DAVIES. JOHN W. DAVIES."

Witnesses:

ROBERT A. Soorr, JOHN W. LEIDIGH.

